Abstract: Methods and apparatus are disclosed for uplink power control of a terminal in a satellite communication system. Calibration data that includes output backoff values corresponding to input backoff values for each of a first set of calibration frequencies is initially stored in the terminal. A normalized transmit power for the terminal is determined for multiple transmit frequencies based on the calibration data. Upon receiving an assigned frequency for communicating, the terminal selects one of the normalized transmit power previously determined and begins transmitting.

Abstract: A network device for providing configurable reference frequencies in a satellite communication system is disclosed. The network device may be any of a satellite modem, satellite transceiver, or satellite router. The network device may receive information pertaining to a type of an Outdoor Unit (ODU), determine the type of ODU based on the received information, and provide a plurality of configurable reference frequencies based on the type of the Outdoor Unit (ODU) such that the plurality of configurable reference frequencies may be used with different combinations of low noise block converters (LNBs) and block-up converters (BUCs).

Abstract: Systems and methods for facilitating handover reduction in satellite systems are disclosed. A system may include a processor and a memory storing instructions, which when executed by the processor, may cause the processor to detect a user terminal that is selected for a handover procedure. The handover procedure may facilitate a switch from a source beam to a target beam. Based on input data, the processor may evaluate an ideal time value pertaining to a pre-defined time instance at which a scheduled handover is to be performed. The scheduled handover may correspond to at least one of a scheduled change in operating frequency within same beam or a scheduled feeder link handover due to a change in gateway communicating with the satellite. Based on the evaluation and the input data, the processor may estimate an optimized time value that pertains to an optimized time instance associated with an expected handover reduction.

Abstract: Systems and methods for differentiated application of an Adaptive Coding and Modulation (ACM) to enhance link performance in satellite communication systems are disclosed. A system may include a processor and a memory storing instructions, which when executed by the processor, cause the processor to dynamically compute bandwidth capacity of a terminal from a plurality of terminals. Based on the computed bandwidth capacity of the terminal, the processor may automatically determine a ModCod to be applied for transmission to or from the terminal to optimize bit error rate (BER) performance. The to processor may determine the ModCod using an ACM technique. For the plurality of terminals, the processor may dynamically determine aggregate bandwidth availability and congestion within the ACM technique to optimize sharing of available bandwidth.

Abstract: A receiver and method for compensating for linear impairments at a receiver including receiving an Rx signal including an asymmetric response of a satellite filter; pre-equalizing the Rx signal with a coefficient; and demodulating, after the pre-equalizing, the Rx signal.

Abstract: A satellite-communications gateway includes a pedestal, a hub movably coupled to the pedestal and supported by the pedestal, an antenna configured for satellite communications, first electronics positioned inside the hub, and second electronics communicatively coupled to the first electronics and positioned inside the pedestal. The antenna is mounted to the hub and supported by the pedestal via the hub. The first electronics is arranged to convert a radio-frequency signal from the antenna to an intermediate-frequency signal and transmit the intermediate-frequency signal to the second electronics. The second electronics is arranged to convert the intermediate-frequency signal to a digital signal.

Abstract: A system comprises a computer having a processor and a memory, the memory storing instructions executable by the processor to identify data to be communicated to a satellite gateway via a satellite, the data including first data and second data, determine to communicate the data to the satellite gateway in a time-division multiplexing (TDM) and time-division multiple access (TDMA) (TDM/TDMA) concurrent transmission mode, and responsive to the determination to communicate the data to the satellite gateway in the TDM/TDMA concurrent transmission mode, transmit the first data to the satellite according to a TDM channel access scheme and transmit the second data to the satellite according to a TDMA channel access scheme that differs from the TDM channel access scheme.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for traffic flow classification using machine learning. In some implementations, a communication device includes an anomaly detector comprising a machine learning model trained to predict whether data traffic patterns differ from a set of observed traffic patterns present in a set of training data. The communication device includes a traffic classifier comprising a machine learning model trained to predict a quality of service (QoS) class for network connections or data flows. The communication device is configured to evaluate network connections or data flows using the anomaly detector. The communication device may (i) use the traffic classifier to predict QoS classes for traffic that the anomaly detector predicts to be similar to the observed traffic patterns, and (ii) store data traffic that the anomaly detector predicts to be different from the observed traffic patterns.

Abstract: The present teachings disclose a multibeam satellite system and methods that can achieve orthogonality between spatially multiplexed signals in a multi-input multi-output (MIMO) configuration when operating in line-of-sight (LOS) uplink and downlink channels on the feeder link side, using essentially a common spot beam. The teachings maximize a MIMO capacity across multiple frequency bands by disclosing an antenna array geometry for disposition on-board a single satellite and for a ground segment.

Abstract: Systems and methods are provided for enabling reliable signaling in the presence of strong phase noise and frequency offset. To this end, a method is provided comprising receiving, at a receiver, a communication signal, including data, from a transmitter via a communication channel, and jointly tracking and jointly correcting phase noise errors and frequency errors in the communication signal with a joint detector using an iterative feedback correction process between an output decoder of the receiver and the joint detector.

Abstract: Various data transmission detection systems are described. A receiver input through which a wireless data transmission signal is received may be present. A plurality of mixers in communication with the receiver input may be present, which may be digitally implemented. A data transmission detector may be present that receives a mixed wireless data transmission signal from each mixer and creates a plurality of scores. A match detection module may be present that receives the scores and identifies a highest score. The signal mapped to the highest score to be selected for further processing.

Abstract: Systems and methods are provided for channelizing. A first stage can provide a WOLA filter bank that can apply a single multiplier resource to perform window weighting for multiple WOLA filter banks. The first stage can remove mixer-based post FFT adjustment and provide equal functionality with a particular modification of tuning mixers at inputs of second stage FIR paths. The first stage can include a variable decimation, using a particular implementation of variable sample block size.

Abstract: A satellite communication system that combines the benefits of Geosynchronous Equatorial Orbit (GEO) and Non-geostationary (NGSO) satellite systems into a GEO-NGSO hybrid satellite system. The hybrid system allows for various uses, such as, a NGSO-GEO-NGSO handoff, a GEO-NGSO-GEO handoff, and/or a multi-transport operation utilizing both the GEO and NGSO satellites. Based on the path delay differences of the GEO and NGSO satellites, the system may create a data buffer to ensure no data loss.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for determining a set of communication parameters for receiving data transmissions. In some implementations, a method includes receiving a first data transmission sent according to a first communication parameter scheme that includes at least one of a first modulation or a first coding. A second data transmission is received. A second communication parameter scheme of the second transmission is determined.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for channel bonding in an adaptive coding and modulation mode. In some implementations, a system receives packets of a data stream for transmission in a satellite communications system. The system determines a modulation and coding arrangement for the received packets. The system generates code blocks that include data from the packets of the data stream. The system assigns the generated code blocks for transmission on different carriers. One or more of the different carriers is operated in an adaptive coding and modulation mode to support multiple modulation and coding arrangements within a single carrier. The system transmits the code blocks on the different carriers using the determined one or more modulation and coding arrangements.

Abstract: A method and system for service management of a complex network including: computing, at a computer, a weather impact score for geographic areas within a coverage area of a satellite; predicting, based on the weather impact score for each of the geographic areas, a degradation of at least one of the satellite links serving a respective geographic area; and sending a notification about the degradation. The method may include calculating, with a computer, a peak Quality of Service (QoS) for each of the satellite links; aggregating, for a duration, transmission errors to calculate an actual QoS for each of the satellite links; and displaying a drill-down dashboard comprising a color-code for each of the satellite links, wherein the color-code corresponds to a severity of a respective discrepancy between a respective peak QoS and a respective actual QoS of a respective satellite link.

Abstract: A system for providing efficient, reliable, and accurate calibration and measurements of a satellite communication (SATCOM) test system, especially in E-band frequencies where precision of measurement and calibration plays a large role in reliable communications at terabit data rates. The system may include a vector network analyzer (VNA), at 67 GHz operation, calibrated using SOLT-type calibrations. The vector network analyzer (VNA) may be communicatively coupled to a device under test (DUT) or system under test (SUT) to obtain calibration and measurement data. The system may also include a signal generator for generating at least one signal. The system may further include an active mixer communicatively coupled to the signal generator. The active mixer may up-convert the least one signal to E-band frequencies. In some examples, the vector network analyzer (VNA), the local oscillator (LO) signal generator, and the active mixer may be synchronized or phase-locked using a reference.

Abstract: Various multi-processor unified memory management systems and methods are detailed herein. In embodiments detailed herein, inter-chip memory management modules may be executed by processors that are in communication via an inter-chip link. A flat memory map may be used across the multiple processors of the system. Each inter-chip memory management module may analyze memory transactions. If the memory transaction is directed to a portion of the flat memory map managed by another processor, the memory-transaction may be translated to a non-memory mapped transaction and transmitted via an inter-chip communication link.

Abstract: Various arrangements for monitoring and enforcing multi-tier throughput assignments in a network, such as satellite-based communication network, are presented. Throughput usage may be monitored on a beam-level, satellite-level, gateway-level, and system level. Throughput usage for individual satellite terminals may be aggregated and used to determine the throughput usage on an entity-by-entity basis. An entity can have one or more sub-entities to which throughput is allocated. Excessive throughput usage for higher-tier entities can result in throughput being restricted for satellite terminals associated with lower-tier entities.

Abstract: A receiver and a method for receiving a radio communication is disclosed. The method includes receiving a burst encoded with a robust modulation coding scheme (MCS) as RX signals; generating, for each of the RX signals, a burst SNR, soft decision symbols and a packet; weighing, each of soft decision symbols with a respective burst SNR, to calculate soft combined symbols that are used to generate a Maximal-Ratio Combining (MRC) packet; and selecting, from the packets and the MRC packet, a CRC passed packet as an output. An adaptive dual burst transmitter is disclosed.